Part of the thrill of the hunt is to try to get to the street art, before it is defaced by others. But one thing that caught our attention is how the hunt — and the consequent iterations of the pieces made by other street artists — have made this an interactive art project.

It's all documented on social media sites, so today, we sifted through Instagram and Twitter and put together a narrative of how Banksy's pieces emerge and how they're changed by those who interact with them: